Submillimeter and near-infrared images of cool dusty debris disks and rings suggest the existence of unseen planets. At dusty but non-imaged stars, semi-major axes of associated planets can be estimated from the dust temperature. For some young stars these semi-major axes are greater than an arc second as seen from Earth. Such stars are excellent targets for sensitive near-infrared imaging searches for warm planets. To probe the full extent of the dust and hence of potential planetary orbits, SIRTF observations should include measurements with the 160mu filter.
@article{arxiv.astro-ph/0311546,
title = {Dusty Debris Disks as Signposts of Planets: Implications for SIRTF},
author = {B. Zuckerman and Inseok Song},
journal= {arXiv preprint arXiv:astro-ph/0311546},
year = {2009}
}